The sources of air pollution are classified as point, line and surface sources. Motor vehicle pollution is modelled as a line source. Hitherto, studies of air pollution have emphasised surface pollution caused by fossil fuel burning for the purposes of obtaining energy and heating, and motor vehicle pollution studies are usually concentrated on land vehicles. In this study, the effect of aircraft emissions on the environment is considered from two different aspects: during cruising, and during landing, take-off and the taxiing. Air pollution caused by aircraft is also estimated for the year 2000, and the pollution caused during cruising is given globally. The contribution of the Istanbul Ataturk airport to surface air pollution is estimated. In addition, the pollution caused by motor vehicles and aircraft are compared, and the variation and the spread of the pollution under certain meteorological conditions are studied.

Ammonium nitrogen recovery using natural zeolite from the permeates of anaerobic membrane bioreactors was investigated with batch and continuous experiments. Regeneration of exhausted zeolite was compared between mechanical shaking and air stripping, and experimental results showed the superiority of air stripping over the shaking. Liquid circulation and air flow rates were optimized in a continuous zeolite-packed column with a separate recovery system consisting of a regeneration chamber and a stripping column....

Abstract
Biorem has successfully demonstrated its high rate odour control system for biosolids exhausts at Ashbridges Bay sewage treatment plant in Toronto, Ontario. The demonstration used XLD™, a biofiltration media engineered specifically for biosolids odours. The system has achieved 95% odour removal in less than 20-s Empty Bed Residence Time (EBRT) despite high concentration of organic sulphur compounds (OSC), and has proven its effectiveness over more than 2 years of operation. OSC removal efficiencies...

The lack of access to safe water and adequate sanitation pose significant health challenges for many individuals and communities in low and middle-income countries. Aside from direct health issues, the lack of access to safe water and adequate sanitation is increasingly associated with psychosocial concerns that affect the wellbeing of individuals and communities. However, the nature of these concerns has received little attention in peer-reviewed literature. This paper draws on environmental stress and ecosocial...

When Harvard’s Biology Research Infrastructure (BRI) facility opened in 2006, they required four biological safety cabinets to provide primary containment during animal procedures. In the selection process, workspace containment and isolation requirements, operation modes for non-use periods and maintenance, building integration, and the energy burden to the building system were all considered. Choosing a cabinet that provided the level of safety required while at the same time offering energy-efficiency...

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